How to fertilize chestnut trees in summer

Answer: Soil fertilization method: A circular ring ditch is excavated in the chestnut canopy drip line. The ditch is 25 cm wide and 20 cm deep. Each plant has applied 1 kg of calcium phosphate, 0.3 kg of urea and 0.25 kg of borax. When fertilizing, urea and borax should be dissolved in water first, then ditched, and water is poured while fertilizing. Root top dressing method: After mixing 0.3%-0.4% urea solution, 0.3%-0.5% bismuth potassium hydrogen phosphate solution and 0.3%-0.4% borax solution, the canopy is sprayed before 9:00 am or after 3 pm on sunny days. Spray again 10 times a day, even spray twice.

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